Valve-operating mechanism.



No. 726,622. I PATENT-ED APR. 28, 1903.

2 J. BISSING.

VALVE OPERATING MECHANISM. APPLIUATION FILED MAY 7, 1902.

No MODELw 3BHEETB-SHEET 1.

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BATENTED APR. 28, 1903.

J. BISSING. VALVE OPERATING MECHANISM.

APPLICATION FILED MAY 71 1902.

3 SHEETS-SHEET 2.

N0 MODEL.

lllli NITED STATES;

PATENT OFFICE.

JUSTUS BISSING, OF HAJY S, CITY, KANSAS.

VALVE-OPERATING MECHANISM.

SPECIFICATION forming part Of Letters Patent No. 72 6,622, dated April28, 1903.

' Application iiled May 7, 1902. Serial No. 106,310. (No model.) i i Toall whom it may concern:

Be it known that I, JUSTUS BISSING, a citizen of the UnitedStates,residing at Hays City, in the county of Ellis and State ofKansas, have invented a new and useful'Valve -Oper-.

ating Mechanism, of which thefollowing is a specification.

My invention relates to certain improvements in steam engines, and hasforits principal object to construct an improved form of valve-operatingmechanism with a view of varying the point of cut-ofi in accordance withthe speed and load.

A furtherobject of the invention is to provide for the return of thesteam-controlling valve to closed position after each operation byconnecting said valve to devices operable by the pressure of steam andto provide for the gradual closing of the valve Without shock or ar. V

A still further object is to provide each steam-valve with an improvedform "of regulating mechanism operable by agovernorof ordinaryconstruction. v

A still further object of theinvention is to provide an improved form ofvalve and valveoperating mechanisms particularlyadapted for use inconnection with rotaryengines of the eccentric-piston type and toso'construct and arrange such mechanism that the opening of the valveswill be properly timed in accordance with the positions of the movableIn the drawings, Figure 1 is an end eleva-.

tion illustrating a form of rotary engine provided with valveoperating'and governing mechanism in accordance with my invention. Fig.2 is a transverse sectional elevation through the steam-chest andcylinder, illns:

. trating the general arrangement of the steamchest and the inletandreversing valves. Fig. 3 is an end elevation illustrating a portionof one of the valve-operating mechanisms drawn to an enlarged scale.Fig. 4 is a plan view of the same, the steam-chest being shown in Isection. Fig. 5 is a longitudinal sectional elevation ot a portion ofthe valve mechanism on the line 5 5 :of Fig. 4. v 1

- Similarnumeralsof reference are employed "to indicate correspondingparts throughout the several figures of the drawings.

, The rotary engine illustrated in the drawings is one of the usualeccentric-piston type, including the cylinder 10, a shaft 11, and arotary piston 12, having movable abutments 13. The steam-chest 14, towhich steam is supplied through a pipe 15, isdivided into upper andlower chambers 16 and 17, communication between said chambers beinggoverned by the steam-inlet valves 18 and 18, located, respectively, invalvechambers 19 and 19. From the chamber 17 lead three ports 20,21, and22, the ports 21- serving'as inlets for the admission of steam to thecylinder 10 and the port 22 being theexhaust-port and incommunicationwith theouter air. In the chamber 17 is. a slide-valve 23,having on its upper face a rack 24, intermeshingwith an adjusting-pinion25, said pinion being mounted on a shaft havingan operating-handleoutside the valve-chest to permit of the adjustment of the slide-valveand direct the flow of steam fromthe steam chest to either side of thecylinder and from-the other side of said cylinder to the exhaust.' ;Thismechanism may be of the class ordinarily employed. in rotary engines,the slide-yalve being merely employed to permit the reversalfiof thedirection of movement of theengine. The cylinder may be further providedwith relief ports 28, arranged at points in advance of the finalexhaustmorts in order to permit the free escape of the steam and preventback pressure on the movable abutments. The steam-inlet valves are ofprecisely the same construction and are operated upon alternately topermit the action of the steam on each of the two abutments carried bythe rotary piston. If only one abutment is employed, the engine may bereadily operated by means of asingle valve, and if more than twoabutments be employed it is preferred to use an equalnumber of valves,the operating mechanism beport 30, leading from the substantiallycylindrical valvechamber 19. The valve 18 is carried by a valve-stem 31,the valve being preferably formed by reducing the area of the stem, asshown in Fig. 4. Each of the valve-chambers m ay be readily formed byboring a circular opening directly through the end portion of thesteam-chest, the ends of the opening being covered by plates 33,whichmay be readily removed to gain access to the valve for examination orrepairs. The end 34 of the valve-stem or spindle is of reduced diameterand projects through a suitable opening in one of the plates 33, and atthe extreme outer end of said stem is secured a disk 35, on which isloosely mounted the pivot-strap of a rocker-arm 36, the latter beingconnected by a link 37 to the upper end of a rock-lever 38, to which thecorresponding lever of the valve at the opposite end of the steam-chestis likewise connected. The rock-lever 38, as shown in Fig. 1, is pivotedon a stud 39 and is provided at its lower end with an open frame 40,adapted to be oper ated upon by a cam or eccentric 41, carried by themain shaft 11 of-the engine, said cam being so mounted and actuated asto operate alternately on the two valves at opposite ends of thesteam-chest.

To the valve-stem 31 is secured a disk 42, recessed to form a shoulder43, with which may engage a hook45, hung on a pin 47, carried by the arm37, said hook and shoulder being held in operative relation by a spring48, carried by the stud 49, which connects the rocker-arm 36 to the link37. The result of an operative movement of the rock-lever 38 is to causea partial rotative movement of the valve-stem 31, the rocker'arm 36rotating on the disk 35 at the end of the valvestem and the hook 45being kept in engagement with the shoulder 43 of cam 42. The reversal ofthis movement would ordinarily move the hook to initial position inreadiness for a subsequent operation.

Referring to Fig. 1, 5O designates a bracket carried bythe cylinder ofthe engine and serving to support the stem 51 of an ordinary type ofgovernor 52, the latter being rotated from the main shaft 11 through anintermediate belt 53 and the usual belt-wheels and bevelgears. At theupper end of the bracket is an arm 54, to which is fuloru med athree-arm lever 55, one end of which is bifurcated and embraces agrooved sleeve, to which vertical movement is imparted by thecentrifugal governor. The remaining arms of the lever 55 are connectedby levers or rods 56 to ad justable cams 57, the connection being suchthat said cams will receive simultaneous movement in opposite directionfrom the governor. Each cam 57 is mounted loosely on the reduced endportion 34 of the valve-stem, and to its periphery is secured awear-block 58, which may be readily removed and replacedwhen worn. Thecontour of the block 58 is governed by the character of the engine andthe work to be performed, its function being to effect the release ofthe hook 45 from the shoulder 43 of the valve-operating disk at anydesired point in the stroke of the engine, the point of cut-off beinggoverned by the vertical movement of the sleeve 56 of the governor. Onthe lower portion of the hook 45 is secured a stud 60, carrying anantifrictionroller 61, adapted to make contact with the wear-block 58 ofthe cam, such wear-block being so arranged and proportioned that thecontact of the roller therewith will move the hook from engagement withthe shoulder 43 and cut-off or permit the cutting off of the flow ofsteam through the inlet-port to the cylinder.

At each end of the steam-chest is a segmental chamber in constantcommunication with the upper chamber 16 of the chest through a suitableport or passage 66, and adjacent to the chamber 65 is a second segmentalchamber 66 in communication with the atmosphere. The main stem of thevalve extends into both of said chambers and is provided with two vanesor wings 68 and 69, arranged at right angles to each other anddisposed,respectively, in the chambers 65 and 67. Both vanes areprovided with packingstrips 70, adapted for contact with the curved andside walls of the chamber, an auxiliary packing-strip 71 beingintroduced between the body of the vane 69 and the valve-stem to preventthe passage of steam from chamber 65 to the atmosphere when the partsare in the position illustrated in 65.

From the lower portion of the chamber 67 extends an opening 72, threadedfor the reception of a nipple 73, carrying a valve box or casing 74, inwhich is a one-way valve 75, adapted to open upwardly when the vanes aremoved in the direction of the arrow in Fig. 5, admitting air below thevane 69. From one side of the chamber 74 leads a pipe provided with aregulating-valve 76, which may be opened to a greater or less extent toregulate the speed of the discharge of air from the chamber 67 when thevanes are moved in a direction the reverse of that indicated by thearrow. In the operation of this portion of the device it is to beunderstood that the vanes 68 and 69 are in theposition indicated in Fig.5 when the valve is closed and the operating mechanism is in theposition illustrated in Figs. 3 and 4. When the rock-lever 38 is movedby the eccentric to exert a pulling strain in the direction of thearrow, Fig. 3, the hook 45 being in engagement with the shoulder 43rotates the disk 42 and the valve-stem, opening the valve and permittingthe flow of steam through the port 30 and port 20 to the cylinder. Thehook is retained in engagement with the shoulder until the roller 61riding over wearblock 58 releases the hook and shoulder, the degree ofopening movement of the valve being governed by the position of thewearblock and the movement of the latter being IIO regulated by thegover'nor. The turning of the valve-stem to open the valve effects amovement of the two vanes 68 and 69 in the direction indicated by thearrow in Fig. 5, the vane 68 moving against the steam-pressure inchamber 65, While the upward movement of the vane 69 induces a flow ofair past the valve 75 and into the chamber 67. As soon as the hook isreleased from the shoulder 43 the steam-pressure exerted on the vane 68returns the vane to its initial position and closes the valve. Thisclosing movement is resisted by the air in thechamber 67, the downwardmovement of the vane 69 compressing the air and closing the valve 75. Asthe air can only escape through the valve 76, such air will becompressed to a greater or less extent, depending on the position of thevalve, and the vanes will be gradually moved to initial position, theair acting as a cushion to prevent any jar or shock which might beoccasioned by the sudden closing of the valve.

The valves at opposite ends'of the steamchest are opened alternately toadmit steam to the lower chamber 17 of the valve-chest, successivechargesflowing through the same inlet-port to the cylinder and actingsuccessively on the abutments therein.

Having thus described my invention, What I claim is- 1. The combinationin a steam-engine, of a steam-chest'having ports, an'oscillating valvefor governing the flow of fluid through said ports, an auxiliary chamberin communication with the steam -chest, an oscillating member arrangedin said auxiliary chamber and connected to the valve, the axes ofoscil-- lation of the valve and movable member being coincident, saidmember being exposed to steam-pressure, and mechanism for removing thevalve to open position against pressure of the steam.

2. In a valve mechanism, a valve, avalvestem, mechanism connected to thevalve-stem for opening thev'alve, a pair of auxiliary chambers, one incommunication with the steam-supply and the other in communication withthe outer air, vanes carried by the valve-stem and arranged in saidchambers, and means for controlling the flow of air from theair-containing chamber.

3. In a valve mechanism, a valve, avalvestem, mechanism connected to thevalve-stem for moving thevalve toopen position,- a pair of segmentalchambers in communication respectively, with the steam-supply and withthe outer air, vanes carried by the valve-stem and disposed in saidchamber, anair-inlet opening having a one-Way valve for admit-' ting airto the air-containing chamber and a regulating-valve for governing thedischarge of air from said chamber.

4. In a valve mechanism, a valve, a valvestem, means connected to thevalve-stem for moving the valve to open position, an auxiliary chamber,a vane carried 'by'the valvestem and arranged within said chamber, aport or passage'for placing said chamber in communication with thesteam-supply to ef- 70 feet the return movement of the valve-to closedposition, and means for retarding the closing movement of the valve.

5. In a valve mechanism, the combination with a valve-chamber connectedby suitable ports with a source of steam'supply and with a cylinder, avalve arranged within said valve-chamber, means for moving said valve toopen position,'a casing contiguous to the valve-chamber and divided intotwo compartments, one compartment connected with a source ofsteam-supply and the other with an air-supply, vanes mounted within thecasing and-having fixed connection with the valve and adapted formovement in an are within said compartments, whereby when the valve ismoved to open position the vanes will move therewith admitting air tothe air-compartment and exhausting the steam'from the steam-compartment,the steam-pressure servo to the valve-stem, a second disk also securedto said stem, a rocker-arm pivotally mounted I00 on the second disk, alink pivotally connect-'- ed to the outer end of the arm, means foroperating the link, a hook pivoted to the link and adapted to" engagethe shoulder of the its free end bearing againstthe hook, an antifriction-roller carried atthe free end of the hook, and agovernor-controlled cam loosely mounted on the valve-stem and adaptedto-11o be'engaged by the roller to efiect'therelease 'of the hook fromthe disk-shoulder.

Intestimony'that I claim the foregoing as JUsTUs BISSING.

Witnesses:

CHAS. H. W LF, CHARLES MILLER.

'first disk, a spring secured to the' pivot con I05 'necting therocker-arm and lug'and having

